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| Autor principal: | |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2408.00979 |
| Etiquetas: |
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- For any positive integer $n$, let $σ(n)$ be the sum of all positive divisors of $n.$ In this paper, it is proved that the set of positive integers $ n $ for which $ σ(30n+1)\geq σ(30n) $ has a density less than $ 0.0371813, $ which answers a recent problem of Pongsriiam in part.